Perhaps you could help me by getting the dimensions I need as I'm no longer at work? I'd like the thickness from inside the bath to the outside, plus the internal legth and width. I reckon we could get a plastic channel profile that would fit, cut mitred joints and seal it.
These plastic linings seem to go brittle at the top and a bit of rough handling can leave open holes where water could get down to the electrics. Grant have no more liners abailable so I can see a lot of baths being made unusable by this fault.
It occurs to me that there must be a way of...
I think the problem is always the third wheel, getting replacement wheels is easy for the outer two but getting one that fits in the thirdwheel space was always the issue for me, as all three need to be the same diameter I drew a blank.
The NTCs I had were around 23k ohm at room temp. However we only used them with DMMs set to measure resistance. I would question the need for 6V, if you use DMMs (Digital Multi Meters) you won't need to worry about the current being small.
When I look at a ratio like that I add the two together to find how many parts there are, so that makes 10 in this case.
You know that the bit you know about is 9/10 and you want 1/10 for the other bit so that's why you divide the number you know by 9. It might be a simpler way of looking at it...